<template>
	<view v-if="goods_info.goods_name" class="goods-detail-container">
		<!-- 轮播图区域 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
			<swiper-item v-for="(item, i) in goods_info.pics" :key="i">
					<image :src="item.pics_big" @click="preview(i)"></image>
			</swiper-item>
		</swiper>
		
		<!-- 商品信息区域 -->
		<view class="goods-info-box">
			<!-- 商品价格 -->
			<view class="price">￥{{goods_info.goods_price}}</view>
			<!-- 商品信息主体区域 -->
			<view class="goods-info-body">
				<!-- 商品名字 -->
				<view class="goods-name">{{goods_info.goods_name}}</view>
				<!-- 收藏 -->
				<view class="favi">
					<uni-icons type="star" size="18" color="gray"></uni-icons>
					<text>收藏</text>
				</view>
			</view>
			<!-- 运费 -->
			<view class="yf">快递：免运费</view>
		</view>
		
		<rich-text :nodes="goods_info.goods_introduce"></rich-text>
		
		<!-- 商品导航组件区域 -->
		<view class="goods_nav">
			<uni-goods-nav :fill="true" :options="options" :button-group="buttonGroup" @click="onClick" @buttonClick="buttonClick" />
		</view>
	</view>
</template>

<script>
	import {$http} from '@escook/request-miniprogram'
	
	uni.$http = $http
	
	//请求的根路径
	$http.baseUrl = 'https://api-hmugo-web.itheima.net'
	
	uni.$showMsg = function(title = "数据请求失败！", duration = 1500) {
		uni.showToast({
			title,
			duration,
			icon: 'none'
		})
	}
	
	export default {
		data() {
			return {
				// 商品对象详情
				goods_info: {},
				
				// 左侧按钮组的配置对象
				options: [{
					icon:'shop',
					text:'店铺'
				},
				{
					icon:'cart',
					text:'购物车',
					info: 2
				}],
				
				// 右侧按钮组的配置对象
				buttonGroup: [{
					text:'加入购物车',
					backgroundColor: '#ff0000',
					color: '#fff'
				},
				{
					text:'立即购买',
					backgroundColor: '#ffa200',
					color: '#fff'
				}]
			};
		},
		
		onLoad(options) {
			const goods_id = options.goods_id
			this.getGoodsDetail(goods_id)
		},
		
		methods: {
			// 获取商品详情数据的方法
			async getGoodsDetail(goods_id) {
				const {data: res} = await uni.$http.get('/api/public/v1/goods/detail', {goods_id: goods_id})
				
				// 请求失败
				if (res.meta.status !== 200) return uni.$showMsg()
				
				// 使用字符串的 replace()方法，为 img 标签添加行内的 style 样式，从而解决图片底部空白间隙的问题
				res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g, '<img style="display:block;"').replace(/webp/g, 'jpg')
				
				// 请求成功
				this.goods_info = res.message
			},
			
			// 实现轮播图的预览效果
			preview(i) {
				// 调用 uni.previewImag() 方法预览图片
				uni.previewImage({
					// 点击图片时，当前图片的索引赋值过去
					current: i,
					// 通过map拿到所有图片的地址并返回为一个数组
					urls: this.goods_info.pics.map(x => x.pics_big)
				})
			},
			
			// 左侧按钮的点击事件
			onClick(e) {
				if (e.content.text === '购物车') {
					uni.switchTab({
						url: '/pages/cart/cart'
					})
				}
			}
		}
	}
</script>

<style lang="scss">
	swiper {
		height: 750rpx;
		
		image {
			height: 100%;
			width: 100%;
		}
	}
	
	.goods-info-box {
		padding: 10px;
		padding-right: 0;
		.price {
			font-size: 18px;
			color: #C00000;
			margin: 10px 0;
		}
		.goods-info-body {
			display: flex;
			justify-content: space-between;
			
			.goods-name {
				font-size: 13px;
				margin-right: 10px;
			}
			.favi {
				width: 120px;
				font-size: 12px;
				display: flex;
				flex-direction: column;
				align-items: center;
				justify-content: center;
				border-left: 1px solid #efefef;
				color: gray;
			}
		}
		.yf {
			font-size: 12px;
			color: gray;
			margin: 10px 0;
		}
	}
	
	.goods_nav {
		position: fixed;
		bottom: 0;
		left: 0;
		width: 100%;
	}
	
	.goods-detail-container {
		padding-bottom: 50px;
	}
</style>
